BurrBrown Products

from Texas Instruments

1

FEATURES

DESCRIPTION

APPLICATIONS

Device

IDRegister

Manufacturer

IDRegister

Configuration

Register

Status

Register

Conversion

Rate

Register

N-Factor

Correction

DXP

8

5

1

2

Resolution

Register

Pointer

Register

Configuration

Register

Remote

Temperature

Register

Local

Temperature

Register

GND

6

7

V+

V+

DXN

TMP421

3

4

A1

A0

Bus

Interface

SDA

SCL

Device

IDRegister

Manufacturer

IDRegister

Configuration

Register

Status

Register

Conversion

Rate

Register

N-Factor

Correction

DX1

1

2

Resolution

Register

Pointer

Register

Configuration

Register

Remote

Temperature

Register

Local

Temperature

Register

6

7

DX2

TMP422

3

4

DX3

DX4

Bus

Interface

SDA

SCL

8

5

GND

V+

V+

TMP421

TMP422

SBOS398A – JULY 2007 – REVISED SEPTEMBER 2007

±1

°C Remote and Local TEMPERATURE SENSOR

in SOT23-8

2345

• SOT23-8 PACKAGE

The TMP421 and TMP422 are remote temperature

sensor monitors with a built-in local temperature

• ±1°C REMOTE DIODE SENSOR (MAX)

sensor.

The

remote

temperature

sensor

• ±1.5°C LOCAL TEMPERATURE SENSOR (MAX)

diode-connected transistors are typically low-cost,

• SERIES RESISTANCE CANCELLATION

NPN- or PNP-type transistors or diodes that are an

• n-FACTOR CORRECTION

integral part of microcontrollers, microprocessors, or

FPGAs.

• TWO-WIRE/SMBus™ SERIAL INTERFACE

Remote

accuracy

is

±1

°C

for

multiple

IC

• MULTIPLE INTERFACE ADDRESSES

manufacturers, with no calibration needed. The

• DIODE FAULT DETECTION

Two-Wire serial interface accepts SMBus write byte,

• RoHS COMPLIANT AND NO Sb/Br

read byte, send byte, and receive byte commands to

configure the device.

the TMP421 and TMP422 include series resistance

• PROCESSOR/FPGA TEMPERATURE

cancellation, programmable non-ideality factor, wide

MONITORING

remote temperature measurement range (up to

+150

°C), and diode fault detection.

• SERVERS

The TMP421 and TMP422 are both available in an

• CENTRAL OFFICE TELECOM EQUIPMENT

8-lead, SOT23 package.

• STORAGE AREA NETWORKS (SAN)

1

Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of

Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.

2

DLP is a registered trademark of Texas Instruments.

3

SMBus is a trademark of Intel Corporation.

4

I2C is a trademark of NXP Semiconductors.

5

All other trademarks are the property of their respective owners.

PRODUCTION DATA information is current as of publication date.

Copyright © 2007, Texas Instruments Incorporated

Products conform to specifications per the terms of the Texas

Instruments standard warranty. Production processing does not

necessarily include testing of all parameters.